Canon EOS 5D IV: What you need to know
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Canon EOS 5D IV: What you need to know

New (and currently exclusive) to the EOS 5D IV is what Canon is calling ‘Dual Pixel Raw’. This mode uses the sensor’s Dual Pixel photo sites (more on that below) to effectively create two 30MP files from a single exposure. The resulting file can be adjusted in Canon’s Digital Photo Professional Software to slightly shift the point of critical focus.

The technology behind this feature is complex – it isn’t light field imagery, although the user experience is similar – and we’ll be digging into it more when we receive a fully reviewable camera, but for now we'd caution you not get your hopes up too high with respect to 'image microadjustment': the degree of re-focusability is miniscule, and this feature isn't a replacement for proper AF microadjustment of your lenses.